Tim Gould Wrote:
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> Could you make the POV file available please
>
> Maybe make a small example MPD file just a couple
> of (simple) stickers embedded and the POV file for
> that. Since the error seems to occur for simple
> stripes those would seem best.
>
> Tim

I don't know much about program code.

I attached some files that was made by LDview and L3P and contain only two stickers.

> I know what the problem is. POVray sees the two
> sides as overlapping due to its precision not
> picking them as different (0.25 is too close
> apparently).
>
I don't think it's a precision problem (or we wouldn't get the mirror effect). As suggested by Steffen, the seam width > thickness effectively turns the sticker inside out.

If by any chance all the parts in your model can be replaced by LGEO ones, you can get rid of seams. It looks like L3P doesn't apply seam for LGEO parts (you can still see the limit between parts because they have rounded edges). I'm not sure Ldview handles the LGEO library but this can be a temporary solution while waiting for a fix.

Weird. I tried with LDView export, looks like POV "sees through" the stickers...
Attached the test file with 3 stickers. The one that renders right is mirrored in Y direction!!! I hope people with better rendering knowledge will be able to explain...
LDView image:
POV render:

I've been experiencing this problem here as well.
POV Export from LDView did not work for stickers 0.25 LDU thin.
The reason was that LDView added a 0.5 seam between bricks to show the gaps:
#declare LDXSW = 0.5; // Seam Width (0 for no seams)
Sadly, the formula used to create the seams just works for bigger bricks, but not for stickers 0.25 LDU thin.
You can confirm this by changing the above line to
#declare LDXSW = 0;
Then your stickers will show correctly.
Sadly, I forgot whether I've reported this problem to Travis already or if a fix is already available.

See here for an updated LDView build that includes Tim's fix. Please note that it is a build of my development source code, so hasn't received the level of testing that an official release does. On the other hand, it also has all the features set to go into the next official LDView release.